The classification of the pneumatic valve flange butterfly and specifications

flange butterfly pneumatic valve is divided into soft sealing flange butterfly pneumatic valve and flange hard seal butterfly valve. Pneumatic valve flange sealing butterfly: suitable for metallurgy, chemical industry, electric power, municipal engineering and medium such as water for water, oil and air pipes, cutting fluid or medium flow rate adjustment, the specific features are:
design, novel structure, the overall size is small, light weight.
and butterfly plate with double eccentric, opening and closing fast, convenient operation.
, no sliding friction between the butterfly plate and the sealing ring, sealing surface wear resistance, long service life, reliable sealing, easy to adjust.
flange hard seal butterfly pneumatic valve has the following characteristics:
, the disc sealing ring is hard and soft cascading sheet metal, has the dual advantages of metal hard seal and elastic sealing, no matter in the case of low and high temperature, has excellent sealing performance.
, using three-dimensional eccentric structure, pneumatic valve seat and disc almost frictionless, have the close tight sealing function.
and pneumatic valve sealing surface, using the overlaying welding stainless steel, cobalt base carbide, sealing surface wear resistance, long service life.
and unique structure, flexible operation, energy saving, convenient and not affected by high and low pressure ring, sealed performance is reliable.

features:. Short length structure, light weight; Component selection is excellent.
　　. Pneumatic valve is double circulation of planar truss type, small flow resistance, improve the efficiency of medium flow, in turn, save pump power and operating efficiency, PN is plain plate.
　 . Pneumatic valve seat is made of stainless steel, with special cement on the pneumatic valve body; Pneumatic rubber disc sealing ring is used directly embedded with zigzag type, do not need to use circle or bolt, so it has a simple structure, good sealing, etc.
　　. In U. S. patent design back pull pin structure to replace the key connection between shaft and pneumatic disc structure, in addition to swap and can make the parts can be pneumatic valve spindle disc close together no clearance, not loose.
　　. Don't have to be removed from the pneumatic valve pneumatic valve shaft and pneumatic valve can replace the sealing ring.
　　. Pneumatic valve spindle bearing adopted since the embellish type bearing, in the operation of the frictional resistance is small, and does not need oiling.
　　. Pneumatic disc seal and pneumatic valve of pneumatic seat contact interface can be up to about + ℃ without leakage.
flange butterfly pneumatic valve main specifications:
(nominal diameter mm DN- DN
nominal pressure PN PN PN
the highest working pressure MPa. 。
seal test pressure MPa. 。 。
MPa strength test pressure. 。 。
applicable medium water, sewage,
medium temperature ℃ or less
medium velocity of M/S or less